Rotary brush.



N0. 677,502' lPatented I l F. G. FARNHAM- U y 2, I90I.

BOTABYBRUSH.

(Application led June 5, '1900.)

(No Model.)

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' Patented luly 2, 190|. F. G. FARNHAM.

ROTARY BRUSH.

(Application lod Juno 5, 1900.)

(llo Nudel.)

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UNTTED STATES PATENT EETcE.

l FRANK GUNN FARNHAM, OF HONESDALE, PENNSYLVANIA.

ROTARY BRUSH.

SPECIFICATION forming part of Letters Patent No. 677,502, dated July 2,1901.

Application filed June 5, 1900.

To @ZZ whom t may concern:

Be it known that I, FRANK GUNN FARNHAM, a citizen of the United States,residing at Honesdale, Pennsylvania, have invented certain new anduseful Improvements in Rotary Brushes, of which the followingis aspecification.

My invention relates to that class of brushes known as rotary or wheelbrushes used for polishing glass, metal, leather, &c.

My invention relates more particularly to the manner of mounting thesections of which the brush is composed upon a spindle, whereby I securea cheap and strong brush.

My invention will be better understood by reference to the incloseddrawings.

Figure lis a cross-section of a sectional brush,showin g it with mountings on a straight spindle. Fig. 2 is a cross-section of a similar brush,showing a modified manner of mounting. Fig. 3 is a plan View, partly insection, of a clamping-sleeve as usedin Fig. 2. Fig. et is a section online 4 of Fig. 5. Fig. 5 is a plan view, partly in section, showing theinclosing spring-band. Fig. 6 is a perspective view of the steel springfor closing the channel in the split sleeve. Fig. 7 is a crosssection ofmy improved clamping-disk, showing it compressing one section. Fig. S isa sectional view showing the manner of mounting a brush on a taperspindle. Fig. 9 is a modication of same. Fig. l0 is an end view of Fig.9. Fig. ll is a view similar to Fig. 2, showing a modiiied form ofclamping-disk and Tiller-rings u and Spanner-holes V. Fig. l2 is a planview of a modified form of steel disk. Fig. 13 is a cross-section ofsame. Fig. 14 is a perspective of a modified form of clamping-sleeve.Fig. l5 is a longitudinal section of saine. Fig. 16 is an end view ofFig. l5.

In Fig. l the carrying member c is an ordinary straight spindle, and b anut tting same. c is abrass or malleable-iron ring with a flangec,adapted to be turned over to clench it to the metal disk d. Disks ofthis shape may be cast from metal and turned to desired shape; but Iprefer to make them of sheet steel or brass, adapted to be drawn in adie to form dilferent bends to gain the result desired-first the flatface dx, the arch ed portion d', the base d", and a secondary baseSerial No. 19,162. (Nomoel.)

portion or rim CZ". Heretofore I have used a plain slightly-dished disk,butI have found that this would spring in to such an extent as toprevent a rm clamping action being secured. My improved disk is designedto overcome this objection and is best defined as a section of atruncated cone flattened at the vertex to receive the ring c, the lianged forming the base. This gives me the truss d, which cannot be depressedunder any ordinary pressure by the nut b when screwed up. The base d"rests upon the cemented part of the brush, compressing the brush firmlywhen screwed up, while the part d" reaches over and compresses the brushmaterial, as shown, making a very stiff and strong construction andallowing that portion of the brush material between lines to c to 'beiiexible. Flexibility is here desired-in fact, is necessary, when doingheavy work, otherwise the brush material Will cut off at The body ofbrush material is by this method made so dense at a: that the articlebeing polished cannot be forced down upon the cement at g'. Thereforethe brush material cannot be cut off. In Fig. l I show the core E, thecloth disks g, the brush material f, and the clench-nails h. I

find it desirable in many instances to provide the disk with a pluralityof openings P,whereby air may penetrate freely to prevent heating of thebrush when in use, as shown in Figs. l2 and 18. At times it may benecessary to get more pressure on the brush material without changingthe shape of the disk, and this may be accomplished by providing the rimd'" with a ring d4, of leather, rubber, or similar material, as shown insaid figures. This thickens up the rim d" and acts the same as if adeeper rim were used and atthe same time it protects any delicatearticle from injury by striking the steel rim. The auX- iliary band orring may be molded from rubber or compressed from leather or othermaterial to iit different sizes of disks and kept in hand for use whenwanted. In vmaking these disks I prefer to use soft annealed steel fromone-sixteenth to three thirty-seconds of an inch thick, depending on thediameters. Sheet-brass may also be used, but is expensive. They may,however, be cast from metal and turned upon a lathe; but at the expense'of lightness, balance, and cost I gain here IOO the greatest amount ofstrength. There is nothing to break, crack, or ily. As one pair of thesedisks costs but little more than a pair of wood disks of similardiameter, as generally used heretofore, a great saving in cost issecured.

In Fig. 2 I show a carrying member in the shape of a tube or sleeve I,adapted to clamp upon either a spindle with or without a thread.Referring to Fig. 3, I is preferably a steel tube threaded at one end,the other end being fitted with a collar J, brazed to tube I. Two lugs ZZ are arranged to receive the screw fm, the slot o being sawed throughthe lugs and a short distance along the tube I. lVhen the screw misdrawn up by means ot a wrench the end of which is squared to tit thesocket in head of screw, the whole device is clamped upon the spindle. Arecess K may be turned in the rim of collar J and a spring n fittedthereto, thus preventing` any possible injury to the article beingpolished by hitting the head of screw m. An openingp, Fig. 6, allows theadmission of the wrench. Fig 5 is a modification showing ashort threadedtube I and with an additional slot 0 in same running across the tube.

In Fig. S I show as a carrying member a sleeve q, east in one piece,having a flange q and a shoulder q. full of some softmetal r, and thishas a tap or hole to secure the taper spindle S. Small projections 2f iprevent the filling from turning inside. I prefer, however, to use thatconstruction shown in Fig. 9, using a steel tube I with a brass collar Ibrazed on. An end View is shownv in Fig. 10, in which I is the steeltube; I', the flange; I, the hexagon nut part, and rr the metal filling.The Vpins t may be used. The lling r is soft enough to allow the spindleS to make its own thread. The nut b may be worked by an ordinary wrenchor made round and a Spanner-wrench used in the holes V V, as in Fig. l5.

In Fig. 1l a longitudinal section of sleeve and collar is shown, with abrush mounted thereon and clamped to a straight spindle having nothreads upon it. Spindles made in this way are used almost exclusivelyin shoe-factories.

With the construction in Fig. 1 it is only necessary to slip on one diskand ring, then the brush, with the second disk and ring, and screw upthe nut, and the brush is ready to run. lVhen a brush is worn out, it isremoved and a new one substituted, using the same disks over and overagain. In Fig. 2 the same ring and nut are used, but mounted on thesteel tube I,which is clamped to the spindle a by the screw m. In Figs.8 and 9 the same ring and nut are used without the clamping device,since it is intended for a I till this sleeve partly screwing up andunscrewing from the taper spindle and is adapted to be used in a vise tohold the tube while putting on the brush before going onto the spindle.This is not required in Fig. 1 nor in Fig. 2, as we already have afulcrum to work on.

It is sometimes desirable to get an open brush with less material; but Ifind, however, that unless I fill up to the thickness of the paper corepieces cr in excess of same the ber will not lay flat, but will draweither to 0ne`side or the other and make it dishing, and to avoid this Iuse tillers as shown at a in Fig. 11. The fillers u are of commonstrawboard, cut into rings or disks and laid in between each sectionofthe brush when they are assembled, the clench-nails passing throughthe whole structure and binding all together. In an open brush like thisused in leatherpolishing I dispense with the rim C Fig. 1, and use thatform shown in Fig. 11, so as to get the pressure on the cemented portionof the ber at the edge only at Instead of making the sleeve in themanner shown in Figs. 2 and 3, I may adopt the form shown in Figs. 14 to16, in which the sleeve I is provided with a plurality of slits y' inits tapered threaded end y. A tapered nut z is adapted to be screwedupon this threaded end, and thus to contract the split portion upon thespindle. In order to hold the sleeve against turning while the nut e' isbeing turned, a nut ,e is secured rigidly to the sleeve and providedwith Spanner-holes, as shown,

IOO

and, if desired, an intermediate washer a" may be used.

Having thus described myinvention, what I claim is l. A rotary brushcomprising a carrying member, brush material carried thereby, opposingdisks having parallel portions abutting against opposite sides of saidbrush material, and inner truss portions inclining outwardly leavingopen spaces between the disks and brush material, and means on saidcarrying member for applying pressure to said truss portions,substantially as described.

2. A rotary brush comprising a carrying member,rings carried thereby,opposing disks carried by said rings, and brush material interposedbetween said disks, each of said disks comprising a iiat portionabutting against its respect-ive ring and having its inner edge seatedin a groove therein, an inclined or conical truss portion, and a iiatportion bearing against the face of the brush material, substantially asdescribed.

3. A rotary brush comprising a tubular car'- rying member, brushmaterial thereon, disks abutting against said brush material and havingtrussed central portions, spaced from said brush material, means forapplying pressure to said trussed central portions, and means forsecuring said carrying member upon an operating shaft or spindle,substantially as described.

4. A rotary brush comprising a tubular IIO split carrying member, brushmaterial carried thereby, lugs on said member on opposite sides of saidsplit or division, and a screw coperating With said lugs for binding themember on an operating-shaft, substantially as described.

5. In a rotary brush, a tubular carrying member having a split channeledportion or ring provided with lugs in said channel, a

screw cooperating with said lugs for tightening said split portion, aguard-spring encircling the same and closing said channel, and brushmaterial carried by said member, substantially as described.

6. In a rotary brush, a carrying member, brush material thereoncomprising brush fiber cloth and cement Wit-l1 the ber projecting beyondthe cloth and cement, rings on said member, disks carried by said ringshaving inclined truss portions and flat portions abutting against thecemented portion of said brush material and having inwardly-turned outeredges projecting beyond the cemented portion and serving to compress andsupport the nncemented portion, substantially as described.

7. A rotary brush comprising a carrying member, rings carriedthereby,opposing disks carried by said rings and reinforcing-bands offlexible material carried by the edges of said disks, and brush materialbetween said disks, substantially as described.

In testimony whereof I aftix my signature in presence of two Witnesses.

FRANK GUNN FARNHAM.

Witnesses:

NORMAN C. FARNHAM, W. H. STONE.

